From help-octave-request at bevo dot che dot wisc dot edu Sat Jan 31 01:07:16 2004
Subject: Misc problems with octave-2.1.53 / gnuplot interaction
From: "Dmitri A. Sergatskov" <dmitri at unm dot edu>
To: octave-help-list <help-octave at bevo dot che dot wisc dot edu>
Date: Sat, 31 Jan 2004 00:06:02 -0700

I have "gset mouse" (no quotes) in my .octaverc to
enable mouse support for gnuplot 3.8j.
Now, with octave-2.1.53 I have the following problem:

<<<<

octave:1> x=linspace(1,100,100);
octave:2> y=sin(x);
octave:3> plot(x,y)
(that worked fine, now try to repeat it)
octave:4> plot(x,y)

gnuplot> et nopolar
octave:5>          ^
          line 0: invalid command


gnuplot> 1 0.841470984807897
          ^
          "/tmp/oct-9EUfzs", line 5: invalid command

 >>>>

It does not have to be the same command -- any consecutive plot command fail
with similar error. The problem goes away if I remove "gset mouse" from .octaverc.

OK. Now I want to debug it and discover that I cannot interject "tee" into
octave_binary:octave:1> gnuplot_binary
gnuplot_binary = gnuplot
octave:2> gnuplot_binary="tee /tmp/gnuplot-oct.cmd |gnuplot"
gnuplot_binary = tee /tmp/gnuplot-oct.cmd |gnuplot
octave:3> x=linspace(1,100,100);
octave:4> y=sin(x);
octave:5> plot(x,y)
sh: line 1: tee /tmp/gnuplot-oct.cmd |gnuplot: No such file or directory
warning: broken pipe
sh: line 1: tee /tmp/gnuplot-oct.cmd |gnuplot: No such file or directory
sh: line 1: tee /tmp/gnuplot-oct.cmd |gnuplot: No such file or directory
sh: line 1: tee /tmp/gnuplot-oct.cmd |gnuplot: No such file or directory

It appears that I cannot have any parameters to the binary name:
octave:6> gnuplot_binary="tee -i"
gnuplot_binary = tee -i
octave:7> plot(x,y)
sh: line 1: tee -i: command not found
warning: broken pipe
sh: line 1: tee -i: command not found
sh: line 1: tee -i: command not found
sh: line 1: tee -i: command not found

It works though for straight "tee":
octave:9> plot(x,y)
octave:10> set data style lines
set nologscale
set nopolar
pl '/tmp/oct-pJf0X6' t "line 1"

OK. With that, see what happens if we put "gset mouse" back into .octaverc.
[dima at localhost dima]$ cat .octaverc
gnuplot_binary="tee"
gset mouse

[dima at localhost dima]$
[dima at localhost dima]$ octave
GNU Octave, version 2.1.53 (i686-pc-linux-gnu).
Copyright (C) 2004 John W. Eaton.

....

Report bugs to <bug-octave at bevo dot che dot wisc dot edu> (but first, please read
http://www.octave.org/bugs.html to learn how to write a helpful report).

gnuplot_binary = tee
octave:1> set data style lines
set mouse

octave:1> x=linspace(1,100,100); y=sin(x);

octave:2> plot(x,y)
set nologscale
set nopolar
octave:3> pl '/tmp/oct-tPnjcR' t "line 1"

(I have to hit "Enter" to get the next prompt -- May this is the problem, no "\n" at the end?)
octave:3> plot(x,y)
octave:4> set nologscale
rep
set nopolar
rep
pl '/tmp/oct-mTqTEa' t "line 1"


===========
If I remove "gset mouse" everything looks pretty much the same:

octave:1> x=linspace(1,100,100); y=sin(x);
octave:2> plot(x,y)
octave:3> set data style lines
set nologscale
set nopolar
pl '/tmp/oct-ViUy5f' t "line 1"

octave:3> plot(x,y)
octave:4> set nologscale
rep
set nopolar
rep
pl '/tmp/oct-0bqBPU' t "line 1"

octave:4>

===============

This problem did not exist in 2.1.50 (I have not tested .51 and .52).
(I do not know when "tee" problem has appeared, but it used to work
at least few releases back.)

Any help would be appreciated.

Sincerely,
Dmitri.






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